#map {
  width: 800px;
  height: 600px;
  background-color: lightgray;
  position: relative;
  margin-top: 10px;
  /* 添加放个地图背景 */
  box-sizing: border-box;
  /* background-image: url('../images/bg.png'); */
  border: 1px dotted lightgreen;
}

.btn1, .btn2, .btn3, .btn4, .btn5 ,.btn6,.btn7{
  width: 100px;
  height: 40px;
  border-radius: 20px;
  background-color: #ccc;
  outline: none;
  margin-right: 10px;
}